Pump and valve.



T. THOMPSON.

PUMP AND VALVE. APPLICATION FILED AUG. 31, 1905.

Patented Sept. 5, 1911.

UNITED STATES PATENT OFFICE.

THOMAS THOMPSON, OF LONDON, ENGLAND.

PUMP AND VALVE.

To all whom it may concern:

Be it known that I, THOMAS THOMPSON, a subject of the King of GreatBritain and Ireland, residing at 85 New Broad street, in the city andcounty of London, England, have invented certain new and usefulImprovements in Pumps and Valves; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention for improvements in pumps and valves relates to pumps ofthat class in which a tubular barrel containing a valve is reciprocatedin the suction and delivery pipes so that the water way has at allpoints the same sectional area, and has for its object to facilitate theoperation of the reciprocating barrel, and to construct the ball valvesand their boxes in such manner that the sectional area of the water wayis practically the same at all points, and to provide means foroperating such valves mechanically; and consists in so forming orcurving the reciprocating barrel that the axis of the crosshead pin bywhich the reciprocating barrel is driven is in the axis ofreciprocation, in constructing the valve chambers and valves so that thearea of flow is uniform and free and practically in a straight line, inproviding the valve chambers with webs to guide the ball, onto its seatand with a cup to limit the action of the ball and a door to enable theball to be taken out, andin operating the valves mechanically by a cupguided axially in a hollow web extending from side to side of thechamber so as to form a bifurcated passage for the water in the valvebox. It will be seen that practically the bifurcation of the waterpassage not only allows of the axial thrust of the connecting rod butalso allows the valve to be actuated axially.

In one way of carrying out this invention the barrel is bifurcated toform two passages and the crosshead pin by which the barrel is driven isfitted in the bifurcation and is driven from the end by a single connecting rod and guided crosshead or by two connecting rods one on eitherend.

In a modification the reciprocating barrel is curved in such a manner asto allow of a direct axial drive through the center line of thepump-itself. This curve may be a single branch or a double branch, thetwo Specification of Letters Patent.

Application filed August 31, 1905.

Patented Sept. 5, 1911.

Serial No. 276,534.

symmetrical branches separating at the beginning of the curve above thevalve and meeting again at the delivery end at a point su'flicientlyhigh to clear the driving connecting rod and if desirable the crank.

The valve may be automatic or mechanically operated. When the valve ismechanically operated it is mechanically pressed down on to its seat atthe end of the return stroke by means of a lever that acts on-a guidedstem against which the valve bears and that is operated by a springcontact pin on the frame, or equivalent means so that the valve is onlymechanically operated just at the moment when it is about to fall on toits seat. If the valve is to be entirely mechanically operated it isconnected to its actuating lever that is operated also at the end of theupstroke to raise the valve off the seat.

The suction and delivery valves each consist of a valve chamber that sosurrounds the ball in its open position that the area of flow is thesame throughout. The valve seating is formed by a metal bush screwedinto the end of the valve box. The ball is guided on to its seat by ribsand below the seat are inclined fins to give the ball a rotary motion bycausing the water under the ball to gyrate. A door is provided towithdraw the ball and a closed pin hole opposite the door to force thevalve out. If these valves are to be mechanically operated they areformed with a bifurcated passage similar to the pump barrel and actuatedin a similar manner to the above described pump barrel valve, viz., by amechanically actuated cup guided axially in a hollow web extending fromside to side of the chamber and which forms the bifurcated passage forthe water passing through the valve box.

In the accompanying sheet of illustrative drawings Figure 1 is ahorizontal section of a pump constructed according to this invention andFig. 2 is a vertical section of the same. Fig. 3 is a cross section ofthe pump barrel just above the valve on the line 00 00. Figs. 4 and 5are cross sections at right angles to one another of the mechanicalvalves. Fig. 6 is a section of an automatic valve.

The tubular barrel a has cylindrical ends that are adapted toreciprocate through the glands Z) c in the ends of the suction anddelivery pipes c f. The barrel a is driven through the central crossheadpin 9 seated guides 11 and connected to the in the solid metal of thebarrel, the water passage curved to one side and back again to the axisto miss the crosshead pin. As shown the water passage is duplicated, thetwo passages 72, passing one on either side of the crosshead pin 9. Thewater passages are shaped as shown so that their combined area is at allpoints equal to the area of the suction or delivery ends of thereciprocating tube and to present easy curves for the passage of thewater.

As shown the crosshead pin 9 is mounted on a slide block 2' sliding inguides Z on the bed plate in and operated by means of the connecting roda from a crank on the main shaft 0. If desired the barrel may be drivenfrom the main shaft by two connecting rods, one on either side in whichcase the slide block and guides may be dispensed with.

The valve p as shown is a ball valve mechanically operated, but a simpleautomatic valve may be used. The ball 79 is contained in a valve chamber9 and is guided on to its seat by the ribs or wings 9". Immediatelyabove the valve is the cup 8 that limits the lift of the valve and thatis fixed to the rod if sliding in the solid metal between the passagesh. A lever to fulcrumed on the pin w bears on the end of the rod t andat the end of the down stroke the outer end of the lever comes againstthe adjustable tappet pin 06 and firmly-presses the ball p on to itsseat.

The suction and delivery valves 2 are contained in the valve boxes 3each formed with a bifurcated passage 4 shaped to give equal area offlow at all points. The ball is guided on to its seat'by the wings orribs 5 and the lift of the valve is limited by the cup (ion the end ofthe slide rod 7 sliding in the solid metal between the passages 4. Alever 8 fulcrumed on the valve casing at 9 is operated by the rod 10sliding in the crosshead pin 9. The rod 10 is fitted with a sleeve inwhich is a spring stop to cushion the blow on the lever 8. At the end ofthe down stroke both suction, pump and delivery valves are pressed on totheir seats. Either the suction or delivery valve or both may bereplaced by an automatic valve.

An automatic valve suitable either for the barrel or the suction ordelivery valve consists of the casing 12 surrounding the ball so as togive equal area of flow at all points. The valve casing is provided withthe wings or ribs'13 guiding the ball on to its seat and with the cup 14supported by the ribs 15 to limit the lift. As shown the cast casing isadapted to be bored out the correct size from the seating end and thenthe seating is screwed in.

In all the valves a removable door 16 is provided for removing,unseating or inspecting the ball valve and a pencil hole stopped by thescrew 17 for inserting a pencil to facilitate removal of the ball. Alsothe valve seating below the valve may be provided with inclined wings 18to give the water and consequently the ball a rotary movement.

What I claim and desire to secure by Let-- ters Patent is 1. A pumpconsisting of suction and delivery pipes, and a reciprocating pumpbarrel having cylindrical ends working in the ends of the suction anddelivery pipes, a solid block in the axis of the cylindrical endsintermediate the ends, a curved water way connecting the said ends andavoiding the said block, a valve in the barrel and a pin secured in andprojecting from the block and a driving means connected to the pin.

2. In a pump with mechanically operated valves the combination withthe'valve casing of a valve seat in the case, a bifurcated water wayleading from the valve seat a solid block intermediate of the branchesof the bifurcated water way and a rod arranged axially in the solidblock and carrying a cup, a valve in position to engage said seat and tobe engaged by said cup, and a means for operating the axial rod at theend of the pump stroke to force the valve on to its seat.

3. In a pump with mechanically operated valves the combination with thevalve casing of a valve seat in the case, a bifurcated water way leadingfrom the valve seat, a solid block intermediate of the branches of thebifurcated water way, a rod arranged axially in the solid block, andcarrying a cup, a valve in position to engage said seat and to beengaged by said cup, a means for operating the axial rod at the end ofthe pump stroke to force the valve on to its seat and a removable door.

In testimony whereof -I aflix my signature, in presence of twowitnesses.

THOMAS THOMPSON.

Witnesses:

FREDK. L. RAND, A. 'NUTTING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents, Washington, D. G. V

